help me with algebra 12

1. What number should be added to the expression x2 + 2x to change it into a perfect square trinomial? 
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Question 2.2. What number should be added to the expression x2 + 14x to change it into a perfect square trinomial? 
(Points : 1)

 
 


 
 


 
 


 
 

Question 3.3. Solve the following equation by transforming it into a perfect square trinomial.

x2 â€“ 14x = 15

(Points : 1)

 
 


 
 


 
 


 
 

Question 4.4. To solve the equation below by completing the square, what is your first step?

2x2 + 12x = 32 

(Points : 1)

 
 

Question 5.5. Solve the following equation by transforming it into a perfect square trinomial.

x2 â€“ 2x = 3

(Points : 1)